Most interesting in System Optimization

Free
It delivers hardware diagnostics, drive repair and daily maintenance.
It is designed for mutiple audio tasks:record live performances.
Free
Provides MacOS users a way to run X Window applications.
Free
Magican helps you improve the performance of your Mac.
A program for monitoring your Wi-Fi network strength.

Top rated in System Optimization

TM Error Logger
Free

View and browse the errors and warnings from the Time Machine.

Bartender 4
Free

Takes control of your menu bar and keeps your items ordered as you want.

OS Cleaner Pro
Free

Optimizes your Mac system by cleaning it of useless files.

Dropzone 4
Free

Open applications, copy, move or share files using many services.

AltTab
Free

Use the Windows Alt-Tab function on a MacOS computer.

OpenCore Configurator
Free

Create custom configuration files for the OpenCore EFI bootloader.

Sensei
Free

Displays system info, monitors performance, and cleans drives of useless files.

CleanerOne
Free

Find and remove junk and large files to regain disk space.

iBoysoft NTFS for Mac
Free

Give your Mac full capability to read and write to Windows NTFS-formatted volumes.

RunCat
Free

Monitor CPU consumption, memory details, disk capacity, and network connection.

One Switch
Free

Access key switchers from the menu bar of your Mac.

Tencent Lemon Lite
Free

Monitors your system and recommends data to purge.

PowerMyMac
Free

Clean up your system and free disk space.

DevCleaner
Free

Reclaim tens of gigabytes of your storage used for various Xcode caches.

EtreCheckPro
Free

Scans your system and generates reports about various areas.

Memory Clean 3
Free

Extremely powerful and super slick app for optimizing your Mac's memory.

AmorphousDiskMark
Free

Assesses read and write performance of your disk drives.

Suspicious Package
Free

Inspect macOS installer packages on your computer.

OS Cleaner
Free

Keep your operating system clean from useless and sensitive data.

Disk Sensei
Free

Check the health status of your disk and boost up the performance of your Mac.